Bitcoin really does feed the rest of the projects, and I even believe that ETH will flip BTC one day...

However, (and I hate to measure this in USD) what if a country or corporation needs to send a billion dollars somewhere? Are they going to use anything but BTC to do that? Probably not.

On the other hand, what if the billion dollars was actually created on a smart-contract network? Then you'd be forced to use the currency that is the cash cow.

This is why I believe Bitcoin (or even POW in general) will turn into an "old-money" currency while smart-contract platforms will start creating massive value via network effect (new-money).